Device for assembling radio parts with axially extending wire leadouts

ABSTRACT

A device for assembling radio parts or similar electronic components having axial wire leadouts, designed mainly for manufacturing miniature radio parts. The device comprises a distributing shaft, a mechanism adapted for feeding caps with wire leadouts into moveable punches arranged one opposite the other, said punches each having a cylindrical socket and a through opening extending along the punch axis and coaxial with said socket. In order to provide for the setting of one of said caps with wire leadouts into said cylindrical socket, a lock is placed in the path of each punch, said lock being operated from a common driving shaft, and a mechanism adapted for feeding ceramic bases delivers the latter to the place of assembly. The device facilitates a high-quality assembly of radio parts having small geometric sizes, at a low percentage of rejection.

United States Patent Alexel Semenovich Amelchenko Varshavskaya ulitsa, 58, kv. 37, Lenningrad, U.S.S.R.

[72] Inventor [21] Appl. No. 847,604 [22] Filed Aug. 5, I969 [45] Patented Sept. 14, 1971 [54] DEVICE FOR ASSEMBLING RADIO PARTS WITH AXIALLY EXTENDING WIRE LEADOUTS 1 Claim, 5 Drawing Figs.

3,499,204 3/1970 Drop 4.

29/2ll X ABSTRACT: A device for assembling radio parts or similar electronic components having axial wire leadouts, designed mainly for manufacturing miniature radio parts.

The device comprises a distributing shaft, a mechanism adapted for feeding caps with wire leadouts into moveable punches arranged one opposite the other, said punches each having a cylindrical socket and a through opening extending along the punch axis and coaxial with said socket. In order to provide for the setting of one of said caps with wire leadouts into said cylindrical socket, a lock is placed in the path of each punch, said lock being operated from a common driving shaft, and a mechanism adapted for feeding ceramic bases delivers the latter to the place of assembly.

The device facilitates a high-quality assembly of radio parts having small geometric sizes, at a low percentage of rejection,

PATENTED SEP 1 4 WI SHEET 1 [1F 3 fiTraRMEYS PATENTEDSEPWQII 3304.093

snmanra FIG. 2 32 27 2 Q 2 7 l I DEVICE FOR ASSEMBLING RADIO PARTS WITII AXIALLY EXTENDING WIRE LEADOUTS The present invention relates to devices for assembling radio parts or similar electronic components having axially extending wire leadouts and is designed mainly for manufacturing, for example, nonwire resistors.

Known in the prior art are devices for assembling nonwire resistors, wherein caps with wire leadouts are installed in open (cut along the diameter) cylindrical sockets of punches, which sockets are displaceable towards each other by means of a shaped cam plate. When so operating, the ceramic base of a resistor is locked in a rigid clamp disposed in the body of a rotor in a disk rigidly connected with the rotor.

Said known devices are designed for assembling resistors whose parts have relatively large weight and geometric dimensions and can be secured in place owing to gravity.

However, said known devices suffer from a number of disadvantages, for instance, nonuniform pressure on the cap during the pressing-on operation due to the presence of the open socket in the punches, which results in warpages and an increased percentage of rejects. Therefore, the attempts at using the known automatic devices for assembling resistors characterized by relatively small geometric dimensions and negligible weight have yielded unfavorable results.

It is an object of the present invention to provide a device for assembling radio parts with axially extending wire leadouts, which facilitates the manufacture of radio parts having very small sizes.

In the accomplishment of this and other objects of the invention, in a device for assembling radio parts with axially extending wire leadouts wherein a mechanism adapted for feeding caps with wire leadouts delivers the latter caps into cooperating moveable punches arranged one opposite the other, and a mechanism adapted for feeding ceramic bases places said bases between the punches for pressing said caps on to both ends of the ceramic base, and wherein according to the invention, each of said punches is provided, for placing therein caps having wire leadouts, with a cylindrical socket and a through opening extending along the punch axis and coaxial with said socket, while in the path of each punch a lock is placed operated from a driving shaft of the device, each lock being fashioned as a lever on which there are hinged two forks spaced at a distance from each other, one of said forks serving for engaging the cap and the other for engaging the wire leadout of said cap.

The invention is further made apparent to those skilled in the art from the following detailed description of an exemplary embodiment thereof, with reference to the accompanying drawings, in which:

FIG. I is a diagrammatic view, partially in section, of the device according to the present invention;

FIG. 2 and 3 are enlarged views illustrating the successive stages of cooperating arrangement of a ceramic base, a cap with a wire leadout, and a punch during the pressing-on operation;

FIG. 4 is a side view illustrating a lock for the punch of FIGS. 2 and 3, side view; and

FIG. Sis a front view of the lock of FIG. 4.

A drive means such as electric motor I (FIG. I) is connected via a V-belt drive 2 with a reducing gear 3 which, in

turn, is connected by means of a chain drive 4 through a friction clutch 5 with a common driving shaft 6 of the device according to the invention. The shaft 6 is provided with a manual control wheel 7 adapted for effecting the manual operating of the device. Two vibration hoppers 8 serve for feeding caps 9 (FIGS. 1, 2 and 3) having wire leadouts 10 to cutoff or gate means 11 (FIG. 1) adapted to individually deliver said caps 'along guides 12 into bifurcated fork-shaped catchers l3 and 14 (FIGS. 4 and 5) of a lock 15 operatively driven from the distributing shaft 6 (FIG. 1) by means of a cam 16. In order to effect the motion of the cutoff or gate means 11 provision is made of levers l8 biased by springs 17, the free ends of said levers essentially comprising resilient ribbon springs 19 serving as shock absorbers in the case of accidental wedging of the cutoff means 1!. A second motor 20 serves to drive an inclined hopper 21 adapted for supplying ceramic bases 22 (FIG. 2) along guide conduit; 23 (FIG. I) to a mechanism 24 adapted for feeding the ceramic buses 22 (FIG. 2 and 3) to a place where the caps 9 (FIG. I, 2 and 3) having wire leadouts II) are pressed onto both ends of said ceramic bases.

Moveable carriages 25 (FIG. I), coupled to the distributing shaft 6 through the intermediary of cams 26, are respectively provided with cooperating pairs of punches 27 arranged one opposite the other and with stops 28 serving to control limiters 29 through rods 30.

The punches 27 (FIGS. 1, 3 and 3),-adapted for pressing the caps 9 with the wire leadouts 10 on the ceramic bases 22 (FIG. 2), are each fashioned with a hollow cylindrical socket 31 to receive the cap 9 and with a passage hole or bore 32 to receive the wire leadout 10.

In addition, the moveable carriages 25 (FIG. 1) include springs 33 which serve as shock absorbers when pressing the caps onto both ends of the ceramic base. Pushers 34 floating in the moveable carriages 25 serve for pushing and ejecting the wire leadouts 10 from the punches 27.

The lock 15 includes levers 35, 36 and 37 (FIGS. 4 and 5) secured rigidly on an axle 38. The latter axle is rotatably mounted in a bearing bracket 39. The lever 35 mounts a roller 40, while on each of the levers 36 and 37 there are mounted the fork-shaped catchers l3 biased with springs 42,'which catchers 13 are mounted to be free from rotation about axles or shafts 14.

The fork-shaped catchers l4 biased with springs 44 (FIG. 5 are mounted for rotation about axles 43 (FIG. 4).

The fork-shaped catchers I3 and 14 are designed for engaging the wire leadouts 10 (FIGS. 1, 2 and 3) of the caps and for guiding them into the punches 27.

The levers 36 and 37 (FIG. 5) carry a sorter or separator means 45 fashioned as a comb with a plurality of needle projections or teeth 46 for sorting out bad units from the assembled resistors and rejecting these.

The device according to the present invention operates in the following manner.

As an operating current is supplied to the electric motor I, rotation is imparted therefrom to the driving shaft 6 via the V- belt drive 2, reducing gear 3, chain drive 4 and friction clutch 5. Simultaneously, the vibrating hoppers 8 are actuated, which serve to deliver the caps 9 with the leadouts 10 to the cutoff means 11, while the energized second electric motor 20 causes the hopper 21 to supply the ceramic bases 22 along the conduit 23 to the mechanism 24 adapted for feeding ceramic bases. The earns 26 impart reciprocating motion to the carriages 25 which, in their turn, by means of the spring 17 which provides oscillating movement of levers 18, while the cutoff means 11 are imparted reciprocating motion through the ribbon springs 29, said cutoff means 11 effecting individual delivery of the caps 9 via the guides 12. The guides 12 provide for the sliding motion therealong of the caps 9 having wire leadouts 10 (with the cap 9 leading). Said purpose is likewise served by an abrupt push exerted upon the cap 9 by the gate or cutoff means I] under the effect of the ribbon spring 19. Placed under the guides 12 on the axial line of the punches 27 are the fork-shaped catchers l3 and 14 designed to engage the caps 9 with the leadouts 10, the free ends of said leadouts thus being directed towards the openings of the punches 27.

The carriages 25 and the punches 27 moving towards each other, the leadouts 10 enter the openings 32 of the punches 27, while the caps 9 are thrust against the limiters 29. While moving on, the wire leadouts encounter the fork-shaped catchers 13 which, in their turn, start rotating around the axle 41, thereby permitting further movement of the punches 27. As soon as the punches 27 approach the fork-shaped catchers 14 (FIGS. 4 and 5), the carn'I6 via the lever 35 deflects the levers 36 and 37, and the fork-shaped catchers. turning around the axle 43 release the wire leadouts 10, thereby letting the punches 27 move on. After the caps 9 are installed in the cylindrical sockets 31, the limiters 29 are removed, and the punches 27 move on in the direction of the ceramic base 22 set by means of the mechanism 24 coaxial with the punches 27. Owing to the cylindrical shape of the sockets 31, the pressure exerted on each cap 9 at the moment of pressing the latter onto the ceramic base 22 is transferred uniformly and no warpages occur in the course of the pressing-on operation.

After the levers 36 and 37 (FIGS. 4 and 5) are fully deflected, the fork-shaped catchers 13 and 14 are set by means of the springs 42 and 44 (FIG. 3) back into their initial position for receiving the subsequent pair of the wire leadouts 10.

During the return motion of the carriages 25 with the punches 27, the cutoff means 11 are actuated by means of the cams 26 through the levers 18 with the resilient ribbon springs 19, said cutoff means 11 delivering the subsequent pair of the caps 9 with wire leadouts to the guides 12. During the return motion of the punches 27, the wire leadout l0 rests against the end face of the pusher 34, owing to which the cap 9 directed to the ceramic base 22 is ejected from the punch 27. Thus, at the moment the wire leadouts 10 are removed from the punches 27, an assembled resistor (not shown in the drawings) drops down onto the sorter or separator 45 (FIG. 3) arranged below the punches 27, which separator under the action of the cam 16 and with the aid of the levers of the lock drops the resistor into a suitable receptacle for good articles.

In the case of an incomplete assembly of the resistor the elements thereof cannot engage the separator 45 and are hence dumped into a suitable container for rejects.

At the moment the carriages 25 are fully returned, the limiters 29 are set into the initial position under the effect of the stops 28 through the rods 30, whereupon the operating cycle is repeated.

The distinguishing feature of the device according to the present invention is that it can be employed with high efficiency for assembling parts having small geometric dimensions and limited mechanical strength. The provision of punches with closed setting sockets to receive the caps therein, as well as of fork-shaped catchers, ensures the entry of the leadouts, with a certain degree of deformation thereof, into the punches, whereas the self-setting ability of the ceramic base at the moment the caps are being pressed thereon makes the assembly of small-size resistors with a high percentage of acceptable articles.

While a preferred embodiment of the invention has been shown and described herein, it is obvious that numerous additions, changes and omissions may be made in such an embodiment without departing from the spirit and scope of the invention, as those skilled in the art will readily understand.

lclaim:

l. A device for assembling electronic components having axially extending wire leadouts, comprising a driving shaft, first feed means adapted to feed ceramic bases singly in sequence, second feed means driven by said driving shaft and adapted to feed singly in sequence caps having wire leadouts, extending axially therefrom, and assembly means adapted to receive the bases and caps from said respective feed means and to press a pair of the caps onto the respective opposite ends of each of the bases, said assembly means comprising a pair of cooperating axially movable punches disposed opposite each other and axially aligned, each of said punches ineluding a cylindrical socket at one end thereof adapted to receive one of the caps therein and a bore extending axially through said punch coaxially with said socket, and a lock driven by said driving shaft and having a pair of levers mounted thereon, each of said levers including a pair of forkshaped catchers spaced from each other and hinged to said lever, one of said catchers of each said lever adapted to engage one of the caps and the other of said catchers adapted to engage the wire leadout extending from that cap. 

1. A device for assembling electronic components having axially extending wire leadouts, comprising a driving shaft, first feed means adapted to feed ceramic bases singly in sequence, second feed means driven by said driving shaft and adapted to feed singly in sequence caps having wire leadouts, extending axially therefrom, and assembly means adapted to receive the bases and caps from said respective feed means and to press a pair of the caps onto the respective opposite ends of each of the bases, said assembly means comprising a pair of cooperating axially movable punches disposed opposite each other and axially aligned, each of said punches including a cylindrical socket at one end thereof adapted to receive one of the caps therein and a bore extending axially through said punch coaxially with said socket, and a lock driven by said driving shaft and having a pair of levers mounted thereon, each of said levers including a pair of fork-shaped catchers spaced from each other and hinged to said lever, one of said catchers of each said lever adapted to engage one of the caps and the other of said catchers adapted to engage the wire leadout extending from that cap. 